The Eigenfrequency Study in a FE-BE model
Hi, I am a beginner in COMSOL Multiphysics and use it for the vibroacoustic modelling. In my model, I use the FEM to model the structure and the BEM to model the external air domain. I got an issue...
View ArticleNatural convection in an enclosure
I am facing trouble in convergence for natural convection problem in a square enclosure for rayleigh number (Ra=10^6), for all other rayleigh number( Ra=10^3, 10^4,10^5) the solution is converging but...
View Articlebox model
how can I model a box empty inside? can I do that by let the material of the block is air? kaindly help
View ArticleCalculation of microwave-heated potatoes
Microwave-heated potatoes are calculated using an electromagnetic wave heating module. Frequency-domain calculations and transient calculations are used to study electromagnetic waves and solid...
View ArticleDecompose Shear ( transverse) and Pressure ( Longitudinal) Waves
Hello everyone I have a model which produces elastic waves, from laser heating. Now I need to identify the displacements originated from shear and pressure waves, to focus on shear wave only. currently...
View ArticleRelaxation of a solid geometry with initial displacement to fundamental...
For a given solid structure (Cantilever beam) with size: length=8mm width=4mm and thickness=0.1mm, I want to investigate the transient behaviour for a given initial displacement. The initial...
View ArticleUndefined variable. - Variable: mf.normB (Magnetic and structural field...
Hi, everybody,I have a multiple physical field (magnetic field and structural field) coupling model to be solved.The magnetic field has been solved already. Then I want to use the mf.normB solved in...
View ArticleIntegrating different COMSOL modules
Hello,I'm trying to simulate my physical setup for my master's thesis in COMSOL. It involves the creation of a magnetic field through applying a current to a copper-made solenoid. The magnetic field...
View ArticleCPU Maxing Out
Hi all,I am brand new to COMSOL and just started using the program about 1 week ago, and I am noticing that when running the COMSOL multiphysics solver that my CPU is nearly maxing out (90%+ usage). I...
View ArticleWrong stress distribution
I'm modeling ice flow using a user defined creep strain rate tensor. I'm getting close to the expected velocities but the stresses are much too high and have an odd distribution that I think indicates...
View ArticleSimulating pipe flow
Hello ,I am trying to simulate fluid flow and couple to species transport in a pipe section of diameter(d) ~5 micrometers and it branched into two pipes of d/2 and merger to form a pipe of dia, d...
View ArticleMoment at the edge of the structure
Hello,I am doing some FSI simulation for a structure that contains mostly circular beams (wind structure reaction). My question is, how can I need find the moments at the constrained edges of the...
View Articlepiezoelectric fan simulation
Hello, I am working on a piezoelectric fan simulation to study the effect of the fans placement on the air output. I just started learning how to use COMSOL and I can't find much help on how to study a...
View Articlethe fatal error during installation
Hello,when I installed COMSOL in my laptop, some errors appeared.----begin fatal error (1)------ 12:13:16 vcredist_vc141_x64.exe excited with exit code 23 ----end fatal error (1)------How to solve this...
View ArticleSound intensity in time domain
Hi all,Could anyone help me with finding the acoustic intensity in time-domain simulation (pressure acoustic, transient)? I'm particularly struggling as Pressure Acoustic, Transient (actd) module does...
View ArticleRadiation in participating media
Hi everybody, I want to calculate the temperature variation in a building with partially transparent walls caused by irradiation by the Sun. For this I used the Heat transfer with surface-to-surface...
View ArticleIncreasing heat flux due to structural deformation
I am trying to model an object that is thermally expanding due to a temperature change. However, as the geometry deforms, the heat flux (which is causing the temperature change) increases because the...
View ArticleAdd a circuit into electrostatics module in the form of weak form instead of...
Hello everyone,Recently I am working on a PZT device, which has a cir shunt. I need to do a eigenfrequency analysis of this device. But cir module does not support eigenvalue solver. As I know one of...
View Article[Re-edited] Following The Tutorial: Mach-Zehnder Modulator - problem plotting...
Hello! I'm having a little trouble following the Mach-Zehnder tutorialhttps://br.comsol.com/model/mach-zehnder-modulator-15061The graphic result was consistent until before Parametric Sweep The...
View ArticleImpedance analysis - Piezo
Hello,I am using COMSOL 2d Axisymmetric model for the imdepance analysis.I've used a probe defining es.nD*es.omega for the current measurement. Using point graph plotting and 1[V]/(abs(bnd1)), I am...
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